.\"	$OpenBSD: hpc.4,v 1.7 2012/04/18 18:01:56 miod Exp $
.\"	$NetBSD: hpc.4,v 1.12 2008/04/30 13:10:56 martin Exp $
.\"
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.\" This document is derived from work contributed to The NetBSD Foundation
.\" by Antti Kantee.
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.Dd $Mdocdate: April 18 2012 $
.Dt HPC 4 sgi
.Os
.Sh NAME
.Nm hpc
.Nd SGI High performance Peripheral Controller
.Sh SYNOPSIS
.Cd "hpc0 at gio0 addr 0x1fb80000"
.Cd "hpc1 at gio0 addr 0x1fb00000"
.Cd "hpc2 at gio0 addr 0x1fb98000"
.\" .Cd "hpc3 at gio0 addr 0x1fb90000"
.Sh DESCRIPTION
.Nm
interfaces the peripherals connected to it to the
.Xr gio 4
bus.
.Nm
is found on the Indigo, Indy, Challenge S, Challenge M,
and Indigo2 machines.
.Pp
There are three different numerical revisions of the
.Nm
controller.
Revisions 1 and 1.5 exist on Indigo machines,
as well as GIO32bis expansion cards such as the E++ SEEQ-based
Ethernet adapter.
Revision 1.5 supports bi-endian operation.
Revision 3 exists on Indy, Challenge S, Indigo2, and Challenge M systems.
It is possible to have an on-board HPC3 as well as HPC1.5-based
GIO32bis adapters in the Indy and Challenge S systems.
Additionally, the Challenge S may have a secondary HPC3 if the IOPLUS
(a.k.a. ''mezzanine'') board is installed.
.Sh LIST OF DEVICES
The devices currently supported are:
.Pp
.Bl -tag -width 10n -offset 3n -compact
.It Xr dpclock 4
DP8573A realtime clock
.It Xr dsclock 4
DS1286 realtime clock
.\" .It Xr haltwo 4
.\" HAL2 audio controller
.It Xr panel 4
front-panel buttons
.It Xr sq 4
Seeq 8003/80C03 Ethernet controller
.It Xr wdsc 4
WD33c93 SCSI controller
.It Xr zs 4
Zilog 8530 (ZSCC) Serial Communications Controller
.El
.Sh SEE ALSO
.Xr gio 4 ,
.Xr imc 4 ,
.Xr intro 4
